Identifying individuals with a high risk of Alzeheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 3-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study: Scores of 3-Minute Screen from Patients ONE to NINE are 3, 8, 10, 8, 8, 7, 4, 5, and 14. Scores of the complete series of cognitive tests from Patients ONE to NINE are 11, 19, 22, 20, 14, 13, 9, 20, and 25. What is the Pearson’s product-moment correlation coefficient? Is the Pearson’s correlation coefficient statistically significant with a two-tailed test with alpha = 0.01? a. 0.835; it is larger than the critical values for the Pearson’s correlation 0.798: It is not statistically significant. b. 0.797; it is larger than the critical values for the Pearson’s correlation 0.666: It is statistically significant. c. 0.797; it is smaller than the critical values for the Pearson’s correlation 0.798: It is statistically significant. d. 0.797; it is larger than the critical values for the Pearson’s correlation 0.765: It is statistically significant. e. 0.835; it is larger than the critical values for the Pearson’s correlation 0.765: It is statistically significant. f. 0.835; it is larger than the critical values for the Pearson’s correlation 0.798: It is statistically significant. g. 0.797; it is larger than the critical values for the Pearson’s correlation 0.666: It is not statistically significant. h. 0.835; it is larger than the critical values for the Pearson’s correlation 0.666: It is statistically significant. i. 0.797; it is larger than the critical values for the Pearson’s correlation 0.765: It is not statistically significant. j. 0.797; it is smaller than the critical values for the Pearson’s correlation 0.798: It is not statistically significant. k. 0.835; it is larger than the critical values for the Pearson’s correlation 0.765: It is not statistically significant. l. 0.835; it is larger than the critical values for the Pearson’s correlation 0.666: It is not statistically significant.
Identifying individuals with a high risk of Alzeheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 3-Minute Screen, which is a quick and easy way to accomplish the same goal. The question is whether the screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study: Scores of 3-Minute Screen from Patients ONE to NINE are 3, 8, 10, 8, 8, 7, 4, 5, and 14. Scores of the complete series of cognitive tests from Patients ONE to NINE are 11, 19, 22, 20, 14, 13, 9, 20, and 25. What is the Pearson’s product-moment
a.
0.835; it is larger than the critical values for the Pearson’s correlation 0.798: It is not statistically significant.
b.
0.797; it is larger than the critical values for the Pearson’s correlation 0.666: It is statistically significant.
c.
0.797; it is smaller than the critical values for the Pearson’s correlation 0.798: It is statistically significant.
d.
0.797; it is larger than the critical values for the Pearson’s correlation 0.765: It is statistically significant.
e.
0.835; it is larger than the critical values for the Pearson’s correlation 0.765: It is statistically significant.
f.
0.835; it is larger than the critical values for the Pearson’s correlation 0.798: It is statistically significant.
g.
0.797; it is larger than the critical values for the Pearson’s correlation 0.666: It is not statistically significant.
h.
0.835; it is larger than the critical values for the Pearson’s correlation 0.666: It is statistically significant.
i.
0.797; it is larger than the critical values for the Pearson’s correlation 0.765: It is not statistically significant.
j.
0.797; it is smaller than the critical values for the Pearson’s correlation 0.798: It is not statistically significant.
k.
0.835; it is larger than the critical values for the Pearson’s correlation 0.765: It is not statistically significant.
l.
0.835; it is larger than the critical values for the Pearson’s correlation 0.666: It is not statistically significant.
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